Burner nozzle



y 13, 1943- N. J. GENDRON 2,324,147

' BURNER NOZZLE Filed Jan. 15, 1941 30 FIG.

" 35 /8 3a FIG..5

V INVENTOR "Nqpolzo y d.- Gancl n W ATTORNEYS Patented July 13, 1943 UNITED STATES PATENT OFFICE BURNER NOZZLE Napoleon J. Gendron, Seattle, Wash.

Application January 15, 1941, Serial No. 874,441

4 Claims.

My invention relates to improvements in burner nozzles for fluid burners, oil burners and the like, employed in connection with furnaces for producing heat.

A great number of oil burners have been developed and a multitude of nozzle tips are also being used. For one reason or another, many of these devices have objectionable features. In some cases, imperfect atomization results in the uneconomical burning of the fluid fuel that is being passed through the nozzle. In other cases, the nozzle tends to accumulate an undue amount of residue that is deposited on the nozzle tip and builds a mass in such a way as to block the nozzle and to impair its efficiency. In still other cases, the nozzle tips are of such a construction and have such fine openings that they become clogged with solids that are in the fluid oil and therefore require frequent cleaning service and necessitate the shut down of the burner during this cleaning period.

It is an important object of my invention to provide a new and improved nozzle design for fluid burners with which such nozzle greater atomization of the fluid is possible.

Another object of my invention is the provision of a nozzle tip usable with a blast air housing of the conventional type for th burning of fluid fuel.

A further object of the invention relates to the provision of a nozzle tip having a flared head and an elongated discharge opening but which is provided with means for dividing the fluid into a multitude of streams.

Still another object of the invention relates in the provision in a flared head nozzle tip of a row of serrations adjacent the discharge end of the nozzle to assist and improve atomization of the burner fluid.

Another object of my invention has been the provision in an oil burner nozzle and its feed tube of means of imparting a vortical movement or motion to the fluid as it is being presented to the discharge end of the nozzle.

Other objects and advantages of the invention will be apparent during the course of the following description wherein I have illustrated a preferred form of my invention.

In the drawing in which like reference numerals refer to like parts throughout the same,

Figure 1 is a plan view with portions in section for convenience of illustration, a blower housing and fluid fuel feed means associated therewith.

Figure 2 is a vertical elevational view of the device of Figure 1,

Figure 3 is a sectional view taken along lines 3-3 of Figure 2, I

Figure 4 is a sectional view taken along lines 4-4 of Figure 2,

Figure 5 is a vertical sectional view longitudinally of the blower head as thoughtaken on lines 5-5 of Figure 1,

Figure 6 is a longitudinal sectional view through the nozzle tip and oil feed tube,

Figure 7 is a front view partially in section taken on line ll' of Figure 6,

Figure 8 is an upper plan view of the flared end of the nozzle,

Figure 9 is a fragmentary perspective view of the flared end of the nozzle as though taken looking toward the discharge end, and

Figure 10 is a front elevational View of the nozzle similar to the showing of Figure '7 but not in section.

In the drawing the reference numeral l5 designates a wall of a furnace or the like which has an opening l6 through which a flame of an oil burner is introduced into the firing chamber. My fluid fuel burner comprises a blower housing It that is provided with opposed adit openings 20, 2! into the interior thereof and in communication with a mixer zone 22.

Referring now to the Figure 5 the interior of the housing I8 can be seen to have an annular converging wall 24 which extends from the right side of the adit openings 20 and 2| as therein viewed, forwardly to a point to the left of the edit opening and terminating in a relatively restricted mouth 26. The chamber defined by the tapered wall 24 and the Wall l8 of the housing associated therewith, is indicated by the numeral 28 and I choose to designate this chamber as the pressure chamber. By means of an upper interiorly threaded boss 3!], an air blast inlet tube 32 is secured to the housing and communicates with the chamber 28.

In the rear wall 34 of the housing I have, formed an opening 35 into which is threaded the bushing 36 that is forwardly tapered as at 31. The outer end has an annular flange 38 and a squared boss 31"). The conventional nipple 40 is threaded into the boss 39 and communicated with the interior chamber 4! of the bushing 35. A conventional pipe fitting coupling 42, designated as a universal coupling, joins the nipple 49 to the elbow 43.

A feed line riser 44 depends from the elbow 53 and is threadedly engaged to the feed valve 25 that has the operating handle 46. The feed line 51 is joined to the valve 45 by means of the elbow 48 and the nipple 49. An oil or fluid fuel feed tube 58 is threaded at 5| and engaged in the forward tapered end 31 of th bushing 35 and communicates with chamber 4 I The forward or discharge end of the feed tube is flared in one axis and converges in the opposite axis as is clearly to be seen in Figures 8, 9, and 10. This flaring and converging may be accomplished by flattening the tube. Thus is produced the elongated slit 54 through which fuel from the interior of the tube may be discharged.

In Figure 6 I have shown the feed tube 5:: as having therein a coil spring 56 that has an outside diameter substantially equal to the inside diameter of the tube. The purpose of the spring- 56 is to form a spiral channel interiorly of the tube to import a vortical motion to fluid passing longitudinally through the tube.

The forward end or feed of the tub 50 is designated as the whole by the numeral 52 and comprises the spreader lip 58, and the dentated or toothed lip 59 having forward inwardly turned teeth 60. The dentations (ill curve slightly and are substantially tangential to the inner surface of the throat through which the fluid is. passed. Teeth 60 disposed across the slit 54 as is clearly shown in Figure 10, are thus placed in the path of fluid under pressure that passes. therethrough. The dentations 60 are of the nature of claw teeth and are tapered on two sides and on one outer face terminating in a substantially sharp point that is disposed in the. path of fluid which discharges with force from the split 54.

The foregoing description and the accompanying drawing are believed to clearly disclose a preferred embodiment of my invention but it will be understood that this disclosure is merely illustrative and that such changes in the invention may b made as are fairly within the. scope and spirit of the following claims.

I claim:

1. A nozzle, comprising: a hollow member having a flared and tapered end forming an elongated discharge openlng, one of the lips of said opening extending forwardly of the other lip, said forwardly extending lip having edge dentations extending axially outward beyond the body of the nozzle whereby fluid passing through said nozzle flows over the forwardly extending lip and its dentations to the tips of the latter for atomizing purposes.

2. A nozzle, comprising: a hollow member having a flared and tapered end forming an elongated discharge opening, means within said body for imparting a vortical movement to fluid passing therethrough, one of said lips of said opening having edge dentations extending axially outward beyond the body of the nozzle, said dentations being curved axisward and having inner faces tangential with the inner face of the lip on which they are formed whereby fluid passing through the nozzle flows smoothly to the tips of the dentations for atomizing purposes.

3. A nozzle, comprising: a hollow member having a flared and tapered end forming an elongated discharge opening, one of the lips having edge dentations extending axially outward beyond the body of the nozzle, each said dentation having a surface tangential with the inner face of the lip on which it is associated, all other surfaces of each dentation being convergent with a point common with the tip of the tangential surface whereby fluid passing through the nozzle flows smoothly to and breaks from the dentations with a minimum of molecular cohesion for atomizing purposes.

4. A nozzle, comprising: a hollow member having a flared and tapered end forming an elongated discharge opening, one of the lips of said opening extending forwardly of the other lip, said forward extending lip having edge dentations that extend outward beyond the body of the nozzle, said dentations being curved axisward and having inner faces tangential with the inner face of the lip on which they are formed, all other-faces of each dentation being convergent with a point common with the tip of the tangential surface whereby fluid passing through the nozzle flows smoothly .to and breaks from the dentations with a minimum of molecular cohesion for atomizing purposes.

NAPOLEON J. GENDRON. 

